Scalable Web Architectures Concepts & Design. For every web application, one of the fundamental factors that decides its success is its ability to seamlessly and efficiently accommodate growth, or “scale”, accordingly with clients' requests.
A scalable web application is a website that is able to handle an increase in users and load, whether in terms of a gradual or abrupt surge, without disrupting end-users' activities. In today’s world, customers have limited patience and empathy for a poorly-designed application. There is no such concept of waiting around for a web page to load, an image to upload, or a form to process. If your application isn’t designed properly, and able to handle requests in a timely manner, it will inevitably be left in the dust. In this article, I will walk you through some of the architectural designs that web applications can be scaled.
The content of this blog will be organized as follows: Monolithic ArchitectureScale with Microservices ArchitectureTake awayWhat’s next? 1. A. B. C. D. E. F. 2. Handling Distributed Transactions in the Microservice world. L'Art De Créer Des Diagrammes d'Architecture. Points Clés La conception de diagrammes architecturaux n'est pas une tâche facile ; elle peut être délicate ou source d'erreurs, même pour les plus simples.
La création de diagrammes cohérents et significatifs apporte clarté et consensus entre les différentes parties prenantes. Dans la plupart des cas, les véritables problèmes ne sont pas strictement liés à l'utilisation d'un langage de description architecturale moins efficace (par exemple UML), mais à la mauvaise compréhension de l'importance des diagrammes, au recours à des directives inappropriées ou incohérentes ou même au manque de formation en architecture. Dans le processus de création des diagrammes, essayez de combiner les diagrammes générés automatiquement avec ceux créés manuellement afin de minimiser le travail, d'illustrer différents ensembles de préoccupations et de couvrir plusieurs niveaux d'abstraction du système. Comme le système évolue, maintenir les diagrammes à jour demande un effort supplémentaire. ?creative=edma-snsd-7Days&device=c&placement=www.geeksforgeeks.
Microservices are an architectural pattern that structures an application as a collection of small, loosely coupled services that operate together to achieve a common goal.
Because they work independently, they can be added, removed, or upgraded without interfering with other applications. While there are numerous benefits to microservices architecture, like easier deployment and testing, improved productivity, flexibility, and scalability, they also pose a few disadvantages, as independently run microservices require a seamless method of communication to operate as one larger application. Event Sourcing : comprendre les bases d'un système évènementiel - Publicis Sapient Engineering - Engineering Done Right. Depuis plusieurs mois, l’Event Sourcing et les systèmes évènementiels sont sur toutes les lèvres.
L’année passée a sans nul doute marqué l’avènement des systèmes dits « réactifs » ou « dirigés par les évènements ». Bien que leur présence ne date pas d’hier, peu d’applications en tirent aujourd’hui bénéfice. API gateway pattern. Context Let’s imagine you are building an online store that uses the Microservice architecture pattern and that you are implementing the product details page.
It must support a variety of different clients including desktop browsers, mobile browsers and native mobile applications. The application might also expose an API for 3rd parties to consume. It might also integrate with other applications via either web services or a message broker. The application handles requests (HTTP requests and messages) by executing business logic; accessing a database; exchanging messages with other systems; and returning a HTML/JSON/XML response. Problem. Architecture - What is opinionated software? Hexagonal Architecture Is Powerful. Continuing our journey through various architectural styles, we’re now headed for Hexagonal Architecture, also known as Ports and Adapters.
What Is Hexagonal Architecture? Hexagonal Architecture is an architectural style that moves a programmer’s focus from conceptual layers to a distinction between the software’s inside and outside parts. The inside part consists of what we would call application and domain layers in a Layered Architecture – its use cases and the domain model it’s built upon. The outside part consists of everything else – UI, database, messaging, and other stuff. The connection between the inside and the outside part of our application is realized via abstractions called ports and their implementation counterparts called adapters. Similarly as in Layered Architecture, there are some principles to be followed: The inside part knows nothing about the outside part. The Essence of Hexagonal Architecture The second important concept is thinking in terms of ports and adapters.
Modèle de domaine. Un article de Wikipédia, l'encyclopédie libre.
Text to UML tools - Fastest way to create your models. A textual UML tool supports the use of textual notations/languages to describe UML models and automatically renders the corresponding graphical UML diagram from that textual description (a few tools also target other kinds modeling languages, like ER or BPMN, and we mention them here as well, but they are the exception).
The textual UML tools market is one of the fastest growing segment in the UML tools market (based on my own perception of visitors’ interest). Together with online modeling tools, they are the go-to option for all people looking for some kind of lightweight solution to draw some models. In fact, since most textual UML tools have an online editor, they are a jackpot for occasional modelers. But why are text-to-UML tools so popular? The short answer is that textual modeling tools have a very low barrier to entry. Still, as you’ll see in the list below, features, expressiveness, and robustness of such tools are rather limited in most cases. PlantUML. Reflection (computer programming) Reflection helps programmers make generic software libraries to display data, process different formats of data, perform serialization or deserialization of data for communication, or do bundling and unbundling of data for containers or bursts of communication.
Effective use of reflection almost always requires a plan: A design framework, encoding description, object library, a map of a database or entity relations. Reflection can be used for observing and modifying program execution at runtime. A reflection-oriented program component can monitor the execution of an enclosure of code and can modify itself according to a desired goal related to that enclosure. This is typically accomplished by dynamically assigning program code at runtime. Reflection is often used as part of software testing, such as for the runtime creation/instantiation of mock objects.